Ke$ha climbs to No. 1 on the mainstream top 40 radio-based Pop Songs chart with "Die Young," the lead single from her Dec. 4 album "Warrior." The song marks her third leader at the format, following her debut single "TiK ToK," which reigned for seven weeks beginning the week of Feb. 6, 2010, and "Your Love Is My Drug," which led for two frames starting on June 19, 2010. With the Pop Songs reporting panel newly expanded to 157 stations, "Young" rewrites the mark for the most weekly plays for a title (13,764) in the chart's 20-year history. Maroon 5's "One More Night," which slips to No. 2 after eight weeks at No. 1, established the mark with 13,168 plays last week.